unicorecomm UM220-IV M0 Industry Grade Multi GNSS Positioning Module User Manual

unicorecomm UM220-IV M0 Industry Grade Multi GNSS Positioning Module

Product Information

The UM220-IV M0 is an industry-grade multi-GNSS positioning module manufactured by Unicore Communications. It is designed to provide accurate positioning information for various applications.

Key Features:

• High-precision positioning
• Multi-GNSS support
• Compact size
• Easy installation
• Reliable performance

Interface:
The UM220-IV M0 module has a user-friendly interface that allows for seamless integration with other devices and systems.

Product Usage Instructions

Introduction
The UM220-IV M0 is a versatile positioning module that can be used in a wide range of applications. This section provides an overview of the product and its key features.

Product Installation
Installation Preparation
Prior to installation, ensure that you have all the necessary  tools and equipment. Prepare the host device and ensure it meets the requirements for integrating the UM220-IV M0 module.

Hardware Installation
Follow the step-by-step instructions provided in the user manual to install the UM220-IV M0 module onto your host device. Make sure to connect all required cables and components correctly.

Technical Specifications
This section provides detailed information about the electrical specifications, operation conditions, and dimensions of the UM220-IV M0 module. Refer to this section for technical details and requirements.

Hardware Design
Design Considerations
Learn about the important design considerations when integrating the UM220-IV M0 module into your system. Follow the guidelines provided to ensure optimal performance and reliability.

Avoid String Power
Understand how to avoid string power issues that may affect the operation of the UM220-IV M0 module. Follow the recommended solutions to prevent any power- related problems.

Antenna
Get information about the antenna requirements and recommendations for the UM220-IV M0 module. Follow the instructions to select and install an appropriate antenna for optimal performance.

Serial Port
Learn about the serial port configuration and settings for the UM220-IV M0 module. Follow the instructions to establish a reliable serial communication connection.

Disassembly
If disassembly of the UM220-IV M0 module is required, refer to this section for instructions on how to safely disassemble the module from your host device.

Package
Product Label Description
Understand the information provided on the product label of the UM220-IV M0 module. This section explains the labels and their meanings for easy identification and reference.

For more detailed information and instructions, refer to the complete user manual available at www.unicorecomm.com.

Revision History

R2.2

| Update power supply VCC and V_BCKP;

Add different PN information and corresponding solutions to avoid string power

| ****

Nov. 2021

R2.3| Add the Note in Section 4.3| Nov. 2021

Disclaimer
Information in this document is subject to change without notices and does not represent a commitment on the part of Unicore Communication, Inc. No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, for any purpose without the express written permission of a duly authorized representative of Unicore Communications, Inc. The information contained within this manual is believed to be true and correct at the time of publication.
© Copyright 2009-2021 Unicore Communications, Inc. All rights reserved.

Foreword
This document offers you information in the features of the hardware, the installation, specification and use of UNICORECOMM UM220-IV M0 product.

Readers It Applies to
This document is applied to the technicians who know GNSS Receiver to some extent but not to the general readers.

Structure of the Document
This document includes the following:

• Introduction: Briefly explaining the functions, performances and installing of the product
• Installation: Containing the list of the product package and the details of product installation
• Technical Specification: Offering technical specifications of the product
• Hardware Specification: Offering all the information of hardware interface of the product Module disassembly introduction
• Package: Provide packing instructions of UM220-IV M0 modules

Introduction

Overview
UNICORECOMM UM220-IV M0 is a dual-system GNSS module. It is designed on the basis of UNICORECOMM’s low power, multisystem, high performance SoC-UFirebird designed. It supports BDS B1+GPS L1 dual-system joint positioning and single system positioning. UM220-IV M0 is compact in size and uses SMT pads to support fully automatic integration of standard discharge and reflow soldering, especially suitable for low cost and low power consumption fields. The radio equipment is in compliance with Directive 2014/53/EU.

Model| PN| Grade| System| Interface| Data Updating Rate
---|---|---|---|---|---
Industry| Automotive| GPS| BDS| GLONASS| UART1| UART2|
UM220-IV M0| 2310408000024| ●| | ●| ●| ●| ●| | 1Hz
UM220-IV M0| 2330322000028| ●| | ●| ●| | ●| | 1Hz

Key Features

Power

Voltage| +3.0~3.6 VDC| |
Power Consumption| 90mW| |
RF Input
Input VSWR| ≤1.5| |
Input Impedance| 50Ω| |
Antenna Gain| 15～30dB| |
Physical Characteristics
Dimension| 10.19.72.2mm| |
Environment
Operating Temperature| -40℃ ~ +85℃| |
Storage Temperature| -45℃ ~ +90℃| |
RoHS| Compliant| |
Input/output Data Interface
UART| 1 UART, LVTTL. Baud rate 4800～115200bps
GNSS Performance
Frequency| BDS B1: 1561.098MHz
GPS L1: 1575.42MHz|
TTFF| Cold Start: 28s Hot Start: 1s Reacquisition: 1s
AGNSS1: 4s|
Positioning Accuracy2| 2.0m (dual-system horizontal, open sky)
3.5m (dual-system vertical, open sky)
Velocity Accuracy (RMS)| 0.1m/s (dual-system, Open sky)|
Sensitivity| | BDS| GPS
Tracking| -161dBm| -161dBm
Acquisition| -146dBm| -147dBm
Hot start| -154dBm| -155dBm
Reacquisition| -157dBm| -158dBm
1PPS Accuracy (RMS)| 20ns| |
Data Updating Rate| 1Hz| |
Data Output| NMEA 0183, Unicore Protocol|

Interface

UART
UM220-IV M0 module supports data transfer and firmware upgrade; the signal input/output level is LVTTL. The default baud rate is 9600bps, which is adjustable, and can be configured up to 115200bps.

1PPS
UM220-IV M0 outputs 1PPS with adjustable pulse width and polarity.

Product Installation

Installation Preparation
UM220-IV M0 modules are Electrostatic Sensitive Devices and require special precautions when handling.

• Follow the steps in section 2.2 in the correct order.
• Electrostatic discharge (ESD) may cause damage to the device. All operations mentioned in this chapter should be carried out on an antistatic workbench, wear an antistatic wrist strap and use a conductive foam pad. If an antistatic workbench is not available, wear an antistatic wrist strap and connect the other end to a metal frame to play a role in anti-static.
• Hold the edge of the module, not in direct contact with the components.
• Please check carefully whether the module has obviously loose or damaged components. If you have questions, please contact us or your local dealer.

Figure 2-1 shows the typical installation of UM220-IV M0 EVK suites.

Please check the contents of the package carefully after receiving the package of UM220-IV M0:

• UM220-IV M0 EVK suite（with AC Adapter）
• UM220-IV M0 User manual.
• uSTAR application package.
• Antenna.
• Antenna connection cable
• Direct serial cable
• PC

Please keep the box and anti-static plastic bags for storage and handling.

Hardware Installation
After the above preparations are complete, follow the steps below to install:

• Step 1： Make sure to take full anti-static measures, such as wearing an anti-static wrist strap, grounding the workbench;
• Step 2： Open the UM220-IV M0 evaluation kit;
• Step 3： Select the GNSS antenna with appropriate gain, fix it in the non-block area, using the appropriate cable to connect the antenna to UM220 EVK;
• Step 4： Connect the PC to the EVK serial port through direct serial cable;
• Step 5： Power the evaluation board and initialize the UM220-IV M0;
• Step 6： Open the uSTAR
• Step 7： Controlled the receiver through uSTAR to display constellations view, log messages, and receiver status.

Technical Specifications

Electrical Specifications
Absolute Maximum Ratings

Operation Condition

Item| Pin| Min| Typical Value| Max| Unit| Condition
---|---|---|---|---|---|---
Power Supply (VCC)| Vcc| 3.0| 3.3| 3.6| V|
Peak Current| Iccp| | | 53| mA| Vcc=3.0 V
Tracking Average
Current| IACQ| 29| 30| 31| mA| Vcc=3.0V
Low Level Input Voltage| Vin_low| | | 0.7| V|
High Level Input Voltage| Vin_high| 1.2| | | V|
Low Level Output
Voltage| Vout_low| | | 0.4| V| Iout=-8 mA
High Level Output
Voltage| Vout_high| Vcc–0.4| | | V| Iout=8 mA
Antenna Gain| Gant| 15| | 30| dB|
Nosie Figure| Nftot| | 2| | dB|
Operation Temperature| Topr| -40| | 85| ℃|

Dimensions
Table 3-1: Dimensions

Pin Definition (Top View)

please leave it hanging
10| GND| I| | Ground
11| RF_IN| I| | GNSS signal input (BDS B1+GPS L1）
12| GND| I| | Ground
13| NC| O| | Reserve
14| VCC_RF3| O| =VCC| Output voltage RF section
15| NC| I/O| | Reserve
16| NC| I/O| | Reserve
17| NC| I/O| | Reserve
18| NC| I/O| | Reserve

Hardware Design

Design in Considerations
To make UM220-IV M0 work normally, you need to properly connect the following:
The Module VCC has good monotonicity. If the VCC power off and then on, the power off time must be more than 10ms.

• Connect all the GND pins to ground.
• Connect the RF_IN signal to the antenna, and the line will keep 50Ω impedance matching.
• Ensure COM1 is connected to a PC or an external processor, users can use this serial port to receive position data. COM1 is also necessary for firmware upgrades.

In order to obtain good performance, special concern should be paid during the design:

• Power supply: Stable and low ripple power is necessary for good performance. Make sure the peak to peak voltage ripple does not exceed 50mV.
  • Use LDO to ensure the purity of power supply
  • Try to place LDO close to the module in layout
  • Widen the power circuit or use copper pour surface to transmit current
  • Avoid walking through any high-power or high inductance devices such as a magnetic coil
• UART interfaces: Ensure that the signals and baud rate of main equipment match that of UM220-IV M0 module
• Antenna interface: Make sure the antenna impedance matches, and the cable is short without any kinks , try to avoid acute angles
• Antenna position: In order to ensure a good signal-to-noise ratio, the antenna should be well isolated from any electromagnetic radiation source, especially an electromagnetic radiation in the frequency range of 1559 ~ 1605MHz
• Try to avoid designing in any circuits underneath UM220-IV M0
• This module is a temperature sensitive device. Dramatic changes in temperature will result in reduced performance, so keep it away as far as possible from any high-power high-temperature air and heating devices.

Avoid String Power
The module input ports of UM220-IV M0 include: RXD and GPIO. When the module is not powered on, if there is data input in the above ports, it will form a series of power on the module VCC. When the series voltage is higher than 1.6V, it may cause a failure of starting up when the module is powered on.

Solution:
When the module is not powered on, make sure that the IO port connected to the module is in a high-resistance state or a low level to avoid string power. Another solution is to connect a 1KΩ resistor in series to the serial port RX, and connect a 33Ω or 1KΩ resistor in series to TX (There is no need to connect any resistor to the TX of the module with PN 2310408000024). It is also recommended to connect a 4.7KΩ resistor in series to the Pin of other necessary PIOs.

Antenna
If UM220-IV M0 uses a +3V active antenna, it is recommended to use the VCC_RF pin output to power the antenna through a feed inductor.

Note: If the user has a high requirement for ESD (> ± 2000 V), the user should consider other method to feed the antenna rather than using the VCC_RF pin. In this case, it is recommended to choose a power supply chip with high ESD protection level. Gas discharge tube, varistor, TVS tube and other high-power protective devices may also be used in the power supply circuit to further protect the module from ESD damage or other Electrical Over-Stress (EOS).
If the UM220-IV M0 uses an active antenna other than +3V, the bias voltage V_BIAS required by the antenna is supplied to the antenna through a feed inductor.

If UM220-IV M0 uses a passive antenna, and the antenna is directly connected to RF_IN pin, the VCC_RF can be suspended. It should be noted that the use of passive antennas may cause a decrease in GNSS performance compared to active antennas.

Serial Port
UM220-IV M0 has one LVTTL serial port, for PC connection, please use a RS232 voltage level converter.

Disassembly
When it is necessary to remove the module, it is recommended to melt the soldering tin of the pins on both sides of the module with an electric soldering iron and remove the module with tweezers. Do not use other means to remove the module (such as using a hot air gun to blow the module), may lead to module damage.

Package

Product Label Description

Package Description
The UM220-IV M0 modules are packaged in vacuum sealed aluminum foil anti- static bags with desiccant and moisture-proof agent. When using reflow welding process to weld modules, please strictly comply with IPC standard to conduct humidity control on modules. As packaging materials such as carrier belt can only withstand the temperature of 65 degrees Celsius, modules shall be removed from the packaging during baking.

External diameter 330mm, internal diameter 100mm, width 24mm, thickness 2.0mm
Carrier Tape| Space between: 20mm

Check the humidity indicator card before soldering. The 30% indication is blue under normal conditions, as shown in figure 6-2. Bake modules firstly before soldering if the 30% indication turns pink, as shown in figure 6-3. The UM220-IV M0 modules are rated at MSL level 3, for more MSL information, please refer to
www.jedec.org.

The shelf life of UM220-IV M0 is one year.

Clean

Do not use alcohol or other organic solvents to clean, or it may leave fluid residues in the shielding shell, causing mildew and other problems.

Reflow Soldering

In order to avoid device falling off, the module should be placed on the top of the main board during welding. Reflow soldering temperature curve is recommended as shown in figure 8-1 below (M705-GRN360 is recommended for solder paste). Note: the module can only be welded once.

Note: The apertures in the stencil need to meet the customer’s own design requirements and inspection specifications, and the thickness of the stencil should be above 0.15mm, and 0.18mm is recommended.

Unicore Communications, Inc.
F3, No.7, Fengxian East Road, Haidian, Beijing, P.R.China, 100094
www.unicorecomm.com
Phone: 86-10-69939800
Fax: 86-10-69939888
[email protected]

www.unicorecomm.com

References

• Home | JEDEC
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